I have a very early example of ARM computing history. A prototype Acorn 1MB 'A' Second Processor with VLSI ARM1 chip, Issue A PCB, engineering bodge wires and a Brazil -0.005 monitor ROM. Thread 🧵 #ARMprocessor#AcornComputers#BBCMicro#RetroComputing
The board features a VLSI ARM1 chip with stepping sticker 5.1, date code 8625 (June 1986), a Ferranti ULA9C018E-7 dated 8444 (late 1984), and 1MB RAM across 32 chips. It connects to a BBC Model B via the Tube interface. #ComputingHistory#VintageComputing